diff --git a/emcc b/emcc
index 135fbfde4..45df432df 100755
--- a/emcc
+++ b/emcc
@@ -751,13 +751,13 @@ else:
 def in_temp(name):
   return os.path.join(temp_dir, os.path.basename(name))
 
-def in_directory( root, child ):
-  #make both absolute    
+def in_directory(root, child):
+  # make both path absolute
   root = os.path.realpath(root)
   child = os.path.realpath(child)
 
-  #return true, if the common prefix of both is equal to directory
-  #e.g. /a/b/c/d.rst and directory is /a/b, the common prefix is /a/b
+  # return true, if the common prefix of both is equal to directory
+  # e.g. /a/b/c/d.rst and directory is /a/b, the common prefix is /a/b
   return os.path.commonprefix([root, child]) == root
 
 # Parses the essential suffix of a filename, discarding Unix-style version numbers in the name. For example for 'libz.so.1.2.8' returns '.so'