Whitespace fix, better error message in symlink builder

site_scons/symlinkBuilder.py

@@ -1,13 +1,13 @@
 #
 # Symlink SCons builder
 #
-# Version 1.1
-# 16-Aug-2019
+# Version 1.2
+# 04-Jun-2020
 #
 
 def Symlink(target, source, env=None):
    """Create symlink target pointing to source.
-   
+
    This builder creates symlinks named target pointing to source.
    Target is removed if exists.
 
@@ -22,11 +22,11 @@ def Symlink(target, source, env=None):
    elif not isinstance(source, list):
        raise TypeError("source must be list")
    if len(target) != len(source):
-       raise ValueError("target and source list must have same size")
+       raise ValueError("target and source lists must have same size")
    for i in range(0,len(target)):
        try:
           os.unlink(str(target[i]))
        except OSError:
-          pass   
+          pass
        os.symlink(str(source[i]),str(target[i]))
    return None