Fix greedy replace all

Author: bthomee

.github/workflows/rhel.yml

@@ -18,7 +18,7 @@ jobs:
   # Build the Docker image for Red Hat Enterprise Linux using different versions
   # of GCC.
   gcc:
-    runs-on: rhel-latest
+    runs-on: ubuntu-latest
     strategy:
       matrix:
         version:
@@ -56,7 +56,7 @@ jobs:
   # we cannot select specific versions of Clang and only get what is available
   # in the package manager.
   clang:
-    runs-on: rhel-latest
+    runs-on: ubuntu-latest
     strategy:
       matrix:
         version: