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-rw-r--r--src/engine/SCons/Tool/tex.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/engine/SCons/Tool/tex.py b/src/engine/SCons/Tool/tex.py
index d361dac..64b9d3b 100644
--- a/src/engine/SCons/Tool/tex.py
+++ b/src/engine/SCons/Tool/tex.py
@@ -781,7 +781,7 @@ def tex_emitter_core(target, source, env, graphics_extensions):
# add side effects if feature is present.If file is to be generated,add all side effects
if Verbose and theSearch:
print("check side effects for ",suffix_list[-1])
- if (theSearch != None) or (not source[0].exists() ):
+ if theSearch is not None or not source[0].exists():
file_list = [targetbase,]
# for bibunit we need a list of files
if suffix_list[-1] == 'bibunit':