fix: notations are seperated by only one space (#241)

src/parser.rs

@@ -474,7 +474,10 @@ fn parse_zero_or_one_value_notation(input: &str) -> nom::IResult<&str, Option<&s
 
 // Parse '<FOO>'
 fn parse_value_notation(input: &str) -> nom::IResult<&str, &str> {
-    preceded(space0, delimited(char('<'), parse_notation_text, char('>')))(input)
+    preceded(
+        one_of(" "),
+        delimited(char('<'), parse_notation_text, char('>')),
+    )(input)
 }
 
 // Parse `a|b|c`

tests/snapshots/integration__validate__help_notations.snap

@@ -0,0 +1,21 @@
+---
+source: tests/validate.rs
+expression: data
+---
+************ RUN ************
+prog -h
+
+OUTPUT
+command cat >&2 <<-'EOF' 
+USAGE: prog [OPTIONS]
+
+OPTIONS:
+       -target <NAME>                          <arch><sub>-<os>-<abi> see the targets command
+  -n <NUM>                                     <num> volumes for input, '0' to prompt interactively
+      --merge <PATH1> <PATH2> <BASE> <RESULT>  Perform a three-way merge by providing paths for two modified versions of a file, the common origin of both modified versions and the output file to save merge results.
+  -h,  -help                                   Print help
+
+EOF
+exit 0
+
+

tests/validate.rs

@@ -42,6 +42,16 @@ fn help_version_exist() {
     snapshot_multi!(script, [vec!["prog", "-h"]]);
 }
 
+#[test]
+fn help_notations() {
+    let script = r###"
+# @option -target <name>            <arch><sub>-<os>-<abi> see the targets command
+# @option -n <num>                  <num> volumes for input, '0' to prompt interactively
+# @option --merge <path1> <path2> <base> <result>  Perform a three-way merge by providing paths for two modified versions of a file, the common origin of both modified versions and the output file to save merge results.
+"###;
+    snapshot_multi!(script, [vec!["prog", "-h"]]);
+}
+
 #[test]
 fn arg_help_subcmd() {
     snapshot!(SCRIPT_ARGS, &["prog", "help", "cmdd"]);