python: Inline expectation should have space after $

This was a regex-find-replace from `# \$(?! )` (using a negative lookahead) to `# $ `.

python/ql/test/library-tests/frameworks/stdlib/PathNormalization.py

@@ -2,17 +2,17 @@ import os.path
 
 path = "un\\normalized/path"
 
-p1 = os.path.normpath(path)  # $pathNormalization
-p2 = os.path.normpath(path=path)  # $pathNormalization
+p1 = os.path.normpath(path)  # $ pathNormalization
+p2 = os.path.normpath(path=path)  # $ pathNormalization
 
 np = os.path.normpath
 
-p3 = np(path)  # $pathNormalization
-p4 = np(path=path)  # $pathNormalization
+p3 = np(path)  # $ pathNormalization
+p4 = np(path=path)  # $ pathNormalization
 
 
 def normalize(path):
-    return os.path.normpath(path)  # $pathNormalization
+    return os.path.normpath(path)  # $ pathNormalization
 
 
 p5 = normalize(path)