Fix Rd documentation errors flagged by R CMD check

[Copilot]

Fixes documentation mistakes across 11 man pages, primarily resolving the checkRd: (-1) Lost braces warnings from R CMD check.

Lost braces (R CMD check warning)

• code{\link{grep}} → \code{\link{grep}} in 5 files (Rfits_all, Rfits_header_convert, Rfits_key_scan, Rfits_point, Rfits_table)

Typos

• explict → explicit (Rfits_all, Rfits_image, Rfits_table, Rfits_table_hdf5, Rfits_all_hdf5)
• Rfit_table → Rfits_table (Rfits_all_hdf5)
• staterow → startrow (Rfits_table)

Grammar

• "if there a problematic" → "if there are problematic" (7 files)
• "we have often need to use" → "we often need to use" (4 files)

Cleanup

• Removed placeholder ~~~ from \seealso in Rfits_gunzip.Rd and plot.Rfits.Rd
• Replaced empty template example in Rfits_gunzip.Rd with a working example

Original prompt

General package review looking for mistakes. Improve quality of documentation where lacking (creating more examples where useful)

---

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.

[Copilot]

Pull request overview

This PR addresses R CMD check documentation warnings by correcting Rd syntax and improving wording/examples across the package’s man pages, reducing checkRd “Lost braces” issues and fixing several typos/grammar problems.

Changes:

• Fixed Rd markup that caused checkRd: (-1) Lost braces warnings (notably \code{\link{...}} usage).
• Corrected repeated typos/grammar (“explicitly”, “startrow”, “there are problematic”, etc.) across multiple man pages.
• Cleaned up \seealso{} sections (removed placeholder ~~~) and replaced an empty template example in Rfits_gunzip.Rd with a runnable example.

Reviewed changes

Copilot reviewed 11 out of 11 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
man/plot.Rfits.Rd	Removes placeholder ~~~ from \seealso{} to avoid Rd parse issues.
man/Rfits_table_hdf5.Rd	Fixes “explict” → “explicit” in header argument docs.
man/Rfits_table.Rd	Fixes typos (“explicitly”, “startrow”), repairs \code{\link{grep}} markup, and improves grammar.
man/Rfits_point.Rd	Repairs \code{\link{grep}} markup and improves grammar.
man/Rfits_key_scan.Rd	Repairs \code{\link{grep}} markup and improves grammar.
man/Rfits_image.Rd	Fixes “explictly” → “explicitly” and improves grammar in zap/NAcheck docs.
man/Rfits_header_convert.Rd	Repairs \code{\link{grep}} markup in zap docs.
man/Rfits_header.Rd	Improves grammar in zap docs.
man/Rfits_gunzip.Rd	Removes placeholder ~~~ in \seealso{} and adds a directly runnable example snippet.
man/Rfits_all_hdf5.Rd	Fixes “explict” → “explicit” and corrects class name typo (“Rfit_table” → “Rfits_table”).
man/Rfits_all.Rd	Repairs \code{\link{grep}} markup and fixes “explicitly” typo in NAcheck docs.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[asgr]

All minor things that should be fixed.