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Memo:

1. Are the added characters (#[]) marked as the reserved set? Yes

     reserved       =  gen-delims / sub-delims
     gen-delims     =  ":" / "/" / "?" / "#" / "[" / "]" / "@"
   

2. (Todo on me) Try out this change in java-storage before merge, and see any failures.
   => [No need to review] trying new reserved characters in http client java-storage#2005

@cHengstler Can you fix the lint failure?

[INFO] --- fmt-maven-plugin:2.9:check (default-cli) @ google-http-client ---
[INFO] Processed 100 files (1 non-complying).
[INFO] Processed 200 files (1 non-complying).
[INFO] Processed 216 files (2 non-complying).
Error:  Found 2 non-complying files, failing build
Error:  To fix formatting errors, run "mvn com.coveo:fmt-maven-plugin:format"
Error:  Non complying file: /home/runner/work/google-http-java-client/google-http-java-client/google-http-client/src/main/java/com/google/api/client/util/escape/PercentEscaper.java
Error:  Non complying file: /home/runner/work/google-http-java-client/google-http-java-client/google-http-client/src/test/java/com/google/api/client/http/UriTemplateTest.java

Hi @suztomo,

thanks for reviewing, linting issues should be solved now.

ci / lint passed.