Editorial: expand iff to if and only if (#232)

index.bs

@@ -478,7 +478,7 @@ spec:css-syntax-3;
   <h5 id="algorithm-collect-creds" algorithm>`[[CollectFromCredentialStore]]` internal method</h5>
     <dfn for="Credential" method export>\[[CollectFromCredentialStore]](origin, options, sameOriginWithAncestors)</dfn>
     is called with an [=environment settings object/origin=], a {{CredentialRequestOptions}}, and a boolean which
-    is true iff the caller's [=environment settings object=] is [=same-origin with its ancestors=].
+    is true if and only if the caller's [=environment settings object=] is [=same-origin with its ancestors=].
     The algorithm returns a set of {{Credential}} objects from the user agent's [=credential store=] that
     match the options provided. If no matching {{Credential}} objects are available, the
     returned set will be empty.
@@ -494,7 +494,7 @@ spec:css-syntax-3;
   <h5 id="algorithm-discover-creds" algorithm>`[[DiscoverFromExternalSource]]` internal method</h5>
     <dfn for="Credential" method export>\[[DiscoverFromExternalSource]](origin, options, sameOriginWithAncestors)</dfn>
     is called [=in parallel=] with an [=environment settings object/origin=], a {{CredentialRequestOptions}} object,
-    and a boolean which is true iff the caller's [=environment settings object=] is
+    and a boolean which is true if and only if the caller's [=environment settings object=] is
     [=same-origin with its ancestors=].
     It returns a {{Credential}} if one can be
     returned given the options provided, `null` if no credential is available, or throws an
@@ -511,7 +511,7 @@ spec:css-syntax-3;
 
   <h5 id="algorithm-store-cred" algorithm>`[[Store]]` internal method</h5>
     <dfn for="Credential" method export>\[[Store]](credential, sameOriginWithAncestors)</dfn>
-    is called [=in parallel=] with a {{Credential}}, and a boolean which is true iff the caller's
+    is called [=in parallel=] with a {{Credential}}, and a boolean which is true if and only if the caller's
     [=environment settings object=] is [=same-origin with its ancestors=].
     The algorithm returns once {{Credential}} is persisted to the [=credential store=].
 
@@ -524,7 +524,7 @@ spec:css-syntax-3;
   <h5 id="algorithm-create-cred" algorithm>`[[Create]]` internal method</h5>
     <dfn for="Credential" method export>\[[Create]](origin, options, sameOriginWithAncestors)</dfn>
     is called [=in parallel=] with an [=environment settings object/origin=], a {{CredentialCreationOptions}},
-    and a boolean which is true iff the caller's
+    and a boolean which is true if and only if the caller's
     [=environment settings object=] is [=same-origin with its ancestors=].
     The algorithm either:
 
@@ -1050,7 +1050,7 @@ spec:css-syntax-3;
   <h4 id="algorithm-collect-known" algorithm>Collect `Credential`s from the credential store</h4>
 
   Given an [=environment settings object/origin=] (|origin|),
-  a {{CredentialRequestOptions}} (|options|), and a boolean which is `true` iff the calling
+  a {{CredentialRequestOptions}} (|options|), and a boolean which is `true` if and only if the calling
   context is [=same-origin with its ancestors=] (|sameOriginWithAncestors|), the user agent may
   <dfn abstract-op local-lt="collect local">collect `Credential`s from the credential store</dfn>,
   returning a set of {{Credential}} objects stored by the user agent locally that match |options|'
@@ -1522,7 +1522,7 @@ spec:css-syntax-3;
 
   <dfn for="PasswordCredential" method>\[[CollectFromCredentialStore]](origin, options, sameOriginWithAncestors)</dfn>
   is called with an [=origin=] (|origin|), a {{CredentialRequestOptions}} (|options|),
-  and a boolean which is `true` iff the calling context is [=same-origin with its ancestors=]
+  and a boolean which is `true` if and only if the calling context is [=same-origin with its ancestors=]
   (|sameOriginWithAncestors|).
   The algorithm returns a set of {{Credential}} objects from
   the [=credential store=]. If no matching {{Credential}} objects are available, the returned set
@@ -1552,7 +1552,7 @@ spec:css-syntax-3;
 
   <dfn for="PasswordCredential" method>\[[Create]](origin, options, sameOriginWithAncestors)</dfn>
   is called with an [=origin=] (|origin|), a
-  {{CredentialCreationOptions}} (|options|), and a boolean which is `true` iff the calling
+  {{CredentialCreationOptions}} (|options|), and a boolean which is `true` if and only if the calling
   context is [=same-origin with its ancestors=] (|sameOriginWithAncestors|).
   The algorithm returns a {{PasswordCredential}} if one can be created,
   `null` otherwise. The {{CredentialCreationOptions}} dictionary must have a `password` member which
@@ -1581,7 +1581,7 @@ spec:css-syntax-3;
   </h4>
 
   <dfn for="PasswordCredential" method>\[[Store]](credential, sameOriginWithAncestors)</dfn> is
-  called with a {{PasswordCredential}} (|credential|), and a boolean which is `true` iff the calling
+  called with a {{PasswordCredential}} (|credential|), and a boolean which is `true` if and only if the calling
   context is [=same-origin with its ancestors=] (|sameOriginWithAncestors|). The algorithm returns
   `undefined` once |credential| is persisted to the [=credential store=].
 
@@ -1875,7 +1875,7 @@ spec:css-syntax-3;
 
   <dfn for="FederatedCredential" method>\[[CollectFromCredentialStore]](origin, options, sameOriginWithAncestors)</dfn>
   is called with an [=origin=] (|origin|), a {{CredentialRequestOptions}} (|options|),
-  and a boolean which is `true` iff the calling context is [=same-origin with its ancestors=] (|sameOriginWithAncestors|).
+  and a boolean which is `true` if and only if the calling context is [=same-origin with its ancestors=] (|sameOriginWithAncestors|).
   The algorithm returns a set of {{Credential}} objects from
   the [=credential store=]. If no matching {{Credential}} objects are available, the returned set
   will be empty.
@@ -1906,7 +1906,7 @@ spec:css-syntax-3;
 
   <dfn for="FederatedCredential" method>\[[Create]](origin, options, sameOriginWithAncestors)</dfn>
   is called with an [=origin=] (|origin|), a
-  {{CredentialCreationOptions}} (|options|), and a boolean which is `true` iff the
+  {{CredentialCreationOptions}} (|options|), and a boolean which is `true` if and only if the
   calling context is [=same-origin with its ancestors=] (|sameOriginWithAncestors|).
   The algorithm returns a {{FederatedCredential}} if one can be created,
   `null` otherwise, or throws an [=exception=] in exceptional circumstances:
@@ -1928,7 +1928,7 @@ spec:css-syntax-3;
   </h4>
 
   <dfn for="FederatedCredential" method>\[[Store]](credential, sameOriginWithAncestors)</dfn> is
-  called with a {{FederatedCredential}} (|credential|), and a boolean which is `true` iff the
+  called with a {{FederatedCredential}} (|credential|), and a boolean which is `true` if and only if the
   calling context is [=same-origin with its ancestors=] (|sameOriginWithAncestors|). The algorithm
   returns `undefined` once |credential| is persisted to the [=credential store=].
 
@@ -2361,7 +2361,7 @@ spec:css-syntax-3;
         `ExampleCredential`'s `[[CollectFromCredentialStore]](origin, options, sameOriginWithAncestors)`
         internal method is called
         with an [=environment settings object/origin=] (`origin`), a CredentialRequestOptions
-        object (`options`), and a boolean which is `true` iff the calling context is [=same-origin with its ancestors=].
+        object (`options`), and a boolean which is `true` if and only if the calling context is [=same-origin with its ancestors=].
         The algorithm returns a set of {{Credential}}
         objects that match the options provided. If no matching {{Credential}} objects are
         available, the returned set will be empty.