Code Improvement - Error strings should not be capitalized

[wgliang]

Code Improvement - Error strings should not be capitalized
https://github.com/golang/go/wiki/CodeReviewComments#error-strings

[codecov]

Codecov Report

Merging #1488 (4779467) into main (6b34050) will not change coverage.
The diff coverage is 100.0%.

@@          Coverage Diff          @@
##            main   #1488   +/-   ##
=====================================
  Coverage   79.0%   79.0%           
=====================================
  Files        127     127           
  Lines       6683    6683           
=====================================
  Hits        5280    5280           
  Misses      1148    1148           
  Partials     255     255           

Impacted Files	Coverage Δ
exporters/otlp/otlphttp/driver.go	93.5% <100.0%> (ø)
metric/registry/registry.go	92.1% <100.0%> (ø)

[XSAM]

Good catch. I found there are still many codes that have such issues. Should we also fix these parts?

e.g.,

opentelemetry-go/exporters/otlp/otlphttp/driver.go

Lines 196 to 199 in c066f15

	return fmt.Errorf("Failed with HTTP status %s", response.Status)
	}
	}
	return fmt.Errorf("Failed to send data to %s after %d tries", address, d.cfg.maxAttempts)

[wgliang]

@XSAM Sure. I will fix the current errors and add the linter check to ensure that it will not continue to occur in the future.

[wgliang]

Good catch. I found there are still many codes that have such issues. Should we also fix these parts?

e.g.,

opentelemetry-go/exporters/otlp/otlphttp/driver.go

Lines 196 to 199 in c066f15

	return fmt.Errorf("Failed with HTTP status %s", response.Status)
	}
	}
	return fmt.Errorf("Failed to send data to %s after %d tries", address, d.cfg.maxAttempts)

Done.

[wgliang]

/ping @XSAM and anyone who needs to review PRs.

[XSAM]

LGTM

[wgliang]

Who can merge this PR?