Exclude binaries from Travis CI formatting tests of this repo

Author: per1234

.travis.yml

@@ -45,17 +45,17 @@ before_install:
 
   # Formatting checks:
   # Check for files starting with a blank line
-  - find . -path ./.git -prune -o -type f -print0 | xargs -0 -L1 bash -c 'head -1 "$0" | grep --regexp="^$"; if [[ "$?" == "0" ]]; then echo "Blank line found at start of $0."; false; fi'
+  - find . -path ./.git -prune -o -type f -print0 | xargs -0 -L1 bash -c 'head -1 "$0" | grep --binary-files=without-match --regexp="^$"; if [[ "$?" == "0" ]]; then echo "Blank line found at start of $0."; false; fi'
   # Check for tabs
-  - "if grep --line-number --recursive --exclude-dir=.git --regexp=$'\t' .; then echo 'Tab found.'; false; fi"
+  - "if grep --line-number --recursive --binary-files=without-match --exclude-dir=.git --regexp=$'\t' .; then echo 'Tab found.'; false; fi"
   # Check for trailing whitespace
   - "if grep --line-number --recursive --binary-files=without-match --exclude-dir=.git --regexp='[[:blank:]]$' .; then echo 'Trailing whitespace found.'; false; fi"
   # Check for non-Unix line endings
   - "if grep --files-with-matches --recursive --binary-files=without-match --exclude-dir=.git --regexp=$'\r$' .; then echo 'Non-Unix EOL detected.'; false; fi"
   # Check for blank lines at end of files
-  - find . -path ./.git -prune -o -type f -print0 | xargs -0 -L1 bash -c 'tail -1 "$0" | grep --regexp="^$"; if [[ "$?" == "0" ]]; then echo "Blank line found at end of $0."; false; fi'
+  - find . -path ./.git -prune -o -type f -print0 | xargs -0 -L1 bash -c 'tail -1 "$0" | grep --binary-files=without-match --regexp="^$"; if [[ "$?" == "0" ]]; then echo "Blank line found at end of $0."; false; fi'
   # Check for files that don't end in a newline (https://stackoverflow.com/a/25686825)
-  - find . -path ./.git -prune -o -type f -print0 | xargs -0 -L1 bash -c 'if test "$(tail --bytes=1 "$0")"; then echo "No new line at end of $0."; false; fi'
+  - find . -path ./.git -prune -o -type f -print0 | xargs -0 -L1 bash -c 'if test "$(grep --files-with-matches --binary-files=without-match --max-count=1 --regexp='.*' "$0")" && test "$(tail --bytes=1 "$0")"; then echo "No new line at end of $0."; false; fi'
 
   - source "${TRAVIS_BUILD_DIR}/arduino-ci-script.sh"