Fixes after code review.

theano/gof/cmodule.py

@@ -1494,7 +1494,7 @@ class GCC_compiler(object):
         and will be run.
 
         If try_run is False, returns the compilation status.
-        If try_run is False, returns a (compile_status, run_status) pair.
+        If try_run is True, returns a (compile_status, run_status) pair.
         """
         if not theano.config.cxx:
             return False

theano/tensor/blas_headers.py

@@ -77,7 +77,10 @@ def detect_macos_sdot_bug():
         detect_macos_sdot_bug.present = False
         return False
 
-    # Else, try a simple fix
+    # Else, the bug is detected.
+    detect_macos_sdot_bug.present = True
+
+    # Then, try a simple fix
     test_fix_code = textwrap.dedent("""\
         extern "C" float sdot_(int*, float*, int*, float*, int*);
         extern "C" float cblas_sdot(int, float*, int, float*, int);