chore: fix some minor issues in comments (#59054)

fix some minor issues in comments

Author: oscardssmith

NEWS.md

@@ -53,7 +53,7 @@ New library functions
   it enables verbose testset entry/exit messages with timing information and sets the default `verbose=true`
   for `DefaultTestSet` to show detailed hierarchical test summaries ([#59295]).
 * Exporting function `fieldindex` to get the index of a struct's field ([#58119]).
-* `Base.donotdelete` is now public. It prevents deadcode elemination of its arguments ([#55774]).
+* `Base.donotdelete` is now public. It prevents deadcode elimination of its arguments ([#55774]).
 * `Sys.sysimage_target()` returns the CPU target string used to build the current system image ([#58970]).
 * `Iterators.findeach` is a lazy version of `findall` ([#54124])
 

doc/src/devdocs/probes.md

@@ -177,8 +177,8 @@ It's sometimes useful to know when a task is spawning other tasks. This is very
 easy to see with `rt__new__task`. The first argument to the probe, `parent`, is
 the existing task which is creating a new task. This means that if you know the
 address of the task you want to monitor, you can easily just look at the tasks
-that that specific task spawned. Let's see how to do this; first let's start a
-Julia session and get the PID and REPL's task address:
+that were spawned by that specific task. Let's see how to do this; first let's
+start a Julia session and get the PID and REPL's task address:
 
 ```
 > julia

doc/src/devdocs/sanitizers.md

@@ -36,7 +36,7 @@ Since [libblastrampoline](https://github.com/staticfloat/libblastrampoline) by d
 uses `RTLD_DEEPBIND`, we need to set the environment variable `LBT_USE_RTLD_DEEPBIND=0`
 when using a sanitizer.
 
-To use one of of the sanitizers set `SANITIZE=1` and then the appropriate flag for the sanitizer you
+To use one of the sanitizers set `SANITIZE=1` and then the appropriate flag for the sanitizer you
 want to use.
 
 On macOS, this might need some extra flags also to work. Altogether, it might

doc/src/manual/performance-tips.md

@@ -1518,7 +1518,7 @@ Further, note the `Statistics` extension `SparseArraysExt` has been activated be
 tree. i.e. see `0.4 ms  Statistics → SparseArraysExt`.
 
 This report gives a good opportunity to review whether the cost of dependency load time is worth the functionality it brings.
-Also the `Pkg` utility `why` can be used to report why a an indirect dependency exists.
+Also the `Pkg` utility `why` can be used to report why an indirect dependency exists.
 
 ```
 (CustomPackage) pkg> why FFMPEG_jll