Update .travis.yml

.travis.yml

@@ -10,9 +10,9 @@ before_install:
 before_script:
 
 script:
-  - 'git diff origin/master -U0 README.md | grep -Pos "(?<=^\+).*" >> temp.md'
+  - 'if [ "$TRAVIS_PULL_REQUEST" != "false" ]; then git diff origin/master -U0 README.md | grep -Pos "(?<=^\+).*" >> temp.md; fi || (exit 0)'
   - 'node tests/test.js temp.md'
-  - 'if [ "$TRAVIS_PULL_REQUEST" != "false" ]; then git diff origin/master -U0 README.md | grep -Pos "(?<=^\+).*" >> temp.md && node tests/test.js temp.md; else node tests/test.js README.md; fi'
+  - 'if [ "$TRAVIS_PULL_REQUEST" != "false" ]; then node tests/test.js temp.md; else node tests/test.js README.md; fi'
   - 'if [ "$TRAVIS_PULL_REQUEST" != "false" ]; then if [ -f temp.md ]; then awesome_bot temp.md --allow-redirect --skip-save-results; else (exit 0); fi else awesome_bot README.md --allow-redirect --skip-save-results; fi'
 
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