-update locs type in gplot and spring_layout

-update default plot_size to square plot

Author: hdavid16

README.md

@@ -188,7 +188,7 @@ gplot(h)
 + `linetype` Type of line used for edges ("straight", "curve"). Default: "straight"
 + `outangle` Angular width in radians for the edges (only used if `linetype = "curve`). Default: `π/5 (36 degrees)`
 + `background_color` Color for the plot background. Default: `nothing`
-+ `plot_size` Tuple of measures for width x height of plot area. Default: `(sqrt(2)*10cm, 10cm)`
++ `plot_size` Tuple of measures for width x height of plot area. Default: `(10cm, 10cm)`
 + `leftpad, rightpad, toppad, bottompad` Padding for the plot margins. Default: `0mm`
 + `pad` Padding for plot margins (overrides individual padding if given). Default: `nothing`
 # Reporting Bugs

src/layout.jl

@@ -102,8 +102,8 @@ julia> locs_x, locs_y = spring_layout(g)
 ```
 """
 function spring_layout(g::AbstractGraph,
-                       locs_x_in::Vector{R1}=2*rand(nv(g)).-1.0,
-                       locs_y_in::Vector{R2}=2*rand(nv(g)).-1.0;
+                       locs_x_in::AbstractVector{R1}=2*rand(nv(g)).-1.0,
+                       locs_y_in::AbstractVector{R2}=2*rand(nv(g)).-1.0;
                        C=2.0,
                        MAXITER=100,
                        INITTEMP=2.0) where {R1 <: Real, R2 <: Real}

src/plot.jl

@@ -110,7 +110,7 @@ Default: `π/5 (36 degrees)`
 Color for the plot background. Default: `nothing`
 
 `plot_size`
-Tuple of measures for width x height for plot area. Default: `(sqrt(2)*10cm, 10cm)`
+Tuple of measures for width x height for plot area. Default: `(10cm, 10cm)`
 
 `leftpad, rightpad, toppad, bottompad`
 Padding for the plot margins. Default: `0mm`
@@ -119,7 +119,7 @@ Padding for the plot margins. Default: `0mm`
 Padding for plot margins (overrides individual padding if given). Default: `nothing`
 """
 function gplot(g::AbstractGraph{T},
-    locs_x_in::Vector{R1}, locs_y_in::Vector{R2};
+    locs_x_in::AbstractVector{R1}, locs_y_in::AbstractVector{R2};
     title = "",
     title_color = colorant"black",
     title_size = 4.0,
@@ -149,7 +149,7 @@ function gplot(g::AbstractGraph{T},
     linetype = "straight",
     outangle = π / 5,
     background_color = nothing,
-    plot_size = (sqrt(2)*10cm, 10cm),
+    plot_size = (10cm, 10cm),
     leftpad = 0mm, 
     rightpad = 0mm, 
     toppad = 0mm,