docs: fix typo and formatting in README and code comments

[tsinglua]

👮🏻👮🏻👮🏻 !!!! REFERENCE THE PROBLEM YOUR ARE SOLVING IN THE PR TITLE AND DESCRIBE YOUR SOLUTION HERE !!!! DO NOT FORGET !!!! 👮🏻👮🏻👮🏻

This commit fixes minor documentation issues:

• Corrects "integrations tests" to "integration tests" in README.md
• Removes extra spaces in code comment examples in x/nft-transfer/types/trace.go

These changes improve documentation clarity and maintain consistent formatting standards.

PR Checklist:

• Have you read the CONTRIBUTING.md?
• Does your PR follow the C4 patch requirements?
• Have you rebased your work on top of the latest master?
• Have you checked your code compiles? (make)
• Have you included tests for any non-trivial functionality?
• Have you checked your code passes the unit tests? (make test)
• Have you checked your code formatting is correct? (go fmt)
• Have you checked your basic code style is fine? (golangci-lint run)
• If you added any dependencies, have you checked they do not contain any known vulnerabilities? (go list -json -m all | nancy sleuth)
• If your changes affect the client infrastructure, have you run the integration test?
• If your changes affect public APIs, does your PR follow the C4 evolution of public contracts?
• If your code changes public APIs, have you incremented the crate version numbers and documented your changes in the CHANGELOG.md?
• If you are contributing for the first time, please read the agreement in CONTRIBUTING.md now and add a comment to this pull request stating that your PR is in accordance with the Developer's Certificate of Origin.

Thank you for your code, it's appreciated! :)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 33.50%. Comparing base (d548d3d) to head (8d1dd7e).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1238   +/-   ##
=======================================
  Coverage   33.50%   33.50%           
=======================================
  Files         105      105           
  Lines       15728    15728           
=======================================
  Hits         5270     5270           
  Misses       9415     9415           
  Partials     1043     1043           

Flag	Coverage Δ
integration_tests	26.02% <ø> (ø)
integration_tests_byzantine	11.52% <ø> (ø)
integration_tests_gov	11.76% <ø> (ø)
integration_tests_grpc	11.76% <ø> (ø)
integration_tests_ibc	26.76% <ø> (ø)
integration_tests_ledger	11.74% <ø> (ø)
integration_tests_slow	11.74% <ø> (ø)
integration_tests_solomachine	11.55% <ø> (ø)
integration_tests_upgrade	11.76% <ø> (ø)

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[songgaoye]

@tsinglua please fix fmt. Thank you!

index 449caa4..140f4ee 100644
--- a/x/nft-transfer/types/trace.go
+++ b/x/nft-transfer/types/trace.go
@@ -56,8 +56,8 @@ func IsAwayFromOrigin(sourcePort, sourceChannel, fullClassPath string) bool {
 //
 // Examples:
 //
-//  - "port-1/channel-1/class-1" => ClassTrace{Path: "port-1/channel-1", BaseClassId: "class-1"}
-//  - "class-1" => ClassTrace{Path: "", BaseClassId: "class-1"}
+//   - "port-1/channel-1/class-1" => ClassTrace{Path: "port-1/channel-1", BaseClassId: "class-1"}
+//   - "class-1" => ClassTrace{Path: "", BaseClassId: "class-1"}
 func ParseClassTrace(rawClassID string) ClassTrace {

https://github.com/crypto-org-chain/chain-main/actions/runs/22944349905/job/66723146500?pr=1238 ci failed not related to this pr. will fix in pr #1239

[tsinglua]

@tsinglua please fix fmt. Thank you!

index 449caa4..140f4ee 100644
--- a/x/nft-transfer/types/trace.go
+++ b/x/nft-transfer/types/trace.go
@@ -56,8 +56,8 @@ func IsAwayFromOrigin(sourcePort, sourceChannel, fullClassPath string) bool {
 //
 // Examples:
 //
-//  - "port-1/channel-1/class-1" => ClassTrace{Path: "port-1/channel-1", BaseClassId: "class-1"}
-//  - "class-1" => ClassTrace{Path: "", BaseClassId: "class-1"}
+//   - "port-1/channel-1/class-1" => ClassTrace{Path: "port-1/channel-1", BaseClassId: "class-1"}
+//   - "class-1" => ClassTrace{Path: "", BaseClassId: "class-1"}
 func ParseClassTrace(rawClassID string) ClassTrace {
 `` `

@songgaoye Thanks. Modified.

Please review it again.