and again fix regex typo

.travis.yml

@@ -46,7 +46,7 @@ matrix:
     - name: "doc tests"
       install:
         # if we not build a PR we remove the patch of the dependencies to their github repo's
-        - 'if [ "$TRAVIS_PULL_REQUEST" == "false" ]; then sed -i "//{^\[patch\.crates-io\] /{:a;N;/\Z}/!ba};/^ruspiro-.*\(git\|path\).*/d" Cargo.toml; fi'
+        - 'if [ "$TRAVIS_PULL_REQUEST" == "false" ]; then sed -i "/{^\[patch\.crates-io\] /{:a;N;/\Z}/!ba};/^ruspiro-.*\(git\|path\).*/d" Cargo.toml; fi'
         - cat Cargo.toml
       script: cargo test --doc --features ruspiro_pi3