another sed regex fix

.travis.yml

@@ -22,7 +22,7 @@ matrix:
         - rustup component add rust-src
         - rustup component add llvm-tools-preview
         # if we not build a PR we remove the patch of the dependencies to their github repo's
-        - 'if [ "$TRAVIS_PULL_REQUEST" == "false" ]; then sed -i "/./{H;$!d} ; x ; s/^\[patch\.crates-io\].*//g" Cargo.toml; fi'
+        - 'if [ "$TRAVIS_PULL_REQUEST" == "false" ]; then sed -i "/^\[patch\.crates-io\]$/ {N; s/^.*//g}" Cargo.toml" Cargo.toml; fi'
       script: cargo make --profile a64-travis pi3
 
     - name: "build 32Bit"
@@ -34,19 +34,19 @@ matrix:
         - rustup component add rust-src
         - rustup component add llvm-tools-preview
         # if we not build a PR we remove the patch of the dependencies to their github repo's
-        - 'if [ "$TRAVIS_PULL_REQUEST" == "false" ]; then sed -i "/./{H;$!d} ; x ; s/^\[patch\.crates-io\].*//g" Cargo.toml; fi'
+        - 'if [ "$TRAVIS_PULL_REQUEST" == "false" ]; then sed -i "/^\[patch\.crates-io\]$/ {N; s/^.*//g}" Cargo.toml" Cargo.toml; fi'
       script: cargo make --profile a32 pi3
 
     - name: "unit tests"
       install:
         # if we not build a PR we remove the patch of the dependencies to their github repo's
-        - 'if [ "$TRAVIS_PULL_REQUEST" == "false" ]; then sed -i "/./{H;$!d} ; x ; s/^\[patch\.crates-io\].*//g" Cargo.toml; fi'
+        - 'if [ "$TRAVIS_PULL_REQUEST" == "false" ]; then sed -i "/^\[patch\.crates-io\]$/ {N; s/^.*//g}" Cargo.toml" Cargo.toml; fi'
       script: cargo test --tests
 
     - name: "doc tests"
       install:
         # if we not build a PR we remove the patch of the dependencies to their github repo's
-        - 'if [ "$TRAVIS_PULL_REQUEST" == "false" ]; then sed -i "/./{H;$!d} ; x ; s/^\[patch\.crates-io\].*//g" Cargo.toml; fi'
+        - 'if [ "$TRAVIS_PULL_REQUEST" == "false" ]; then sed -i "/^\[patch\.crates-io\]$/ {N; s/^.*//g}" Cargo.toml" Cargo.toml; fi'
         - cat Cargo.toml
       script: cargo test --doc