check_sources does some sanity checks to IPython source files

tools/check_sources.py

@@ -0,0 +1,15 b''
+from path import path
+fs = path('..').walkfiles('*.py')
+
+for f in fs:
+    errs = ''
+    cont = f.bytes()
+    if '\t' in cont:
+        errs+='t'
+
+    if '\r' in cont:
+        errs+='r'
+        
+    if errs:
+        print "%3s" % errs, f
+    
  No newline at end of file