Improve grammar of principles.md

doc/development/fe_guide/principles.md

@@ -8,8 +8,8 @@ Discuss your architecture design in an issue before writing code. This helps dec
 
 ## Be consistent
 
-There are multiple ways of writing code to accomplish the same results. We should be as consistent as possible in how we write code across our codebases. This will make it more easier us to maintain our code across GitLab.
+There are multiple ways of writing code to accomplish the same results. We should be as consistent as possible in how we write code across our codebases. This will make it easier for us to maintain our code across GitLab.
 
 ## Improve code [iteratively](https://about.gitlab.com/handbook/values/#iteration)
 
-Whenever you see with existing code that does not follow our current style guide, update it proactively. You don't need to fix everything, but each merge request should iteratively improve our codebase, and reduce technical debt where possible.
+Whenever you see existing code that does not follow our current style guide, update it proactively. You don’t need to fix everything, but each merge request should iteratively improve our codebase, and reduce technical debt where possible.