.github/ISSUE_TEMPLATE.md: Correct typos. Fixes #503

.github/ISSUE_TEMPLATE.md

@@ -2,15 +2,16 @@
 
 Thank you for giving feedback to the stlink project. Take some time to fill out
  check boxes with a X in the following items so developers and other people can try to
- to find out what is going on. And add/remove what is appropiate to your problem.
+ to find out what is going on. And add/remove what is appropriate to your problem.
 
-When submitting a feature request, try to reuse the list and add/remove what is appropiate.
+When submitting a feature request, try to reuse the list and add/remove what is appropriate.
+ Place a `X` between the brackets `[X]` to mark the list item.
 
 - [ ] Programmer/board type: e.g Stlink/v1, Stlink/v2, Stlink/v2-onboard
 - [ ] Programmer firmware version: e.g STSW-LINK007 2.27.15
 - [ ] Operating system: e.g Linux, Mac OS X, Windows (with specific version)
 - [ ] Stlink tools version and/or git commit hash: e.g v1.1.0/git-c722056
-- [ ] Stlink commandline tool name: e.g `st-info`, `st-flash`, `st-util` 
+- [ ] Stlink commandline tool name: e.g `st-info`, `st-flash`, `st-util`
 - [ ] Target chip (and optional board): e.g STM32F402VG (STM32Fxxx Discovery)
 
 A as-detailed description possible of the problem with debug output when available.