add spell checking support

[ThierryO]

No description provided.

[ElsLommelen]

An issue that may be typical to the Dutch language: the use of hyphens. Some examples to illustrate:

• zomer- en wintereik gives a spelling error for zomer-
• html-bestand or `.html`-bestand
  I'm not sure this can be solved on a general level?

Note that `.html`-bestand is viewed as -bestand by the spell checker.

I think it is only safe to the replace the hyphen in case it is in the middle of the word (html-bestand becomes two words html and bestand). Or when the word starts with a hyphen (-bestand is checked a bestand). I'm reluctant to change that for words ending with an hyphen. They might not be a correct word on themselves. In such case, add them to the custom dictionary.

In case of zomer- en wintereik, I 'd prefer to add zomer- en wintereik to to the custom dictionary instead of zomer-, because the latter is not a correct word on itself (like you mention). Is it an option to implement that, or is it too complicated? (It can be useful for expressions as well, but the use is maybe too limited to do the effort?)

(Of course I don't mind adding the word manually to the dictionary file, but for now adding this is not preventing from marking zomer- as an error.)

[ThierryO]

xxx / yyy / zzz seems to be the proper way to write this. I'll remove any / that is surrounded by whitespace. So xxx / yyy / zzz will be checked as xxx yyy zzz, whereas xxx/yyy/zzz will remain xxx/yyy/zzz.

Could it be that this issue is only solved for .Rmd files and not for .Rd files (yet)?

fixed in abb87f7

[ThierryO]

An issue that may be typical to the Dutch language: the use of hyphens. Some examples to illustrate:

• zomer- en wintereik gives a spelling error for zomer-
• html-bestand or `.html`-bestand
  I'm not sure this can be solved on a general level?

Note that `.html`-bestand is viewed as -bestand by the spell checker.
I think it is only safe to the replace the hyphen in case it is in the middle of the word (html-bestand becomes two words html and bestand). Or when the word starts with a hyphen (-bestand is checked a bestand). I'm reluctant to change that for words ending with an hyphen. They might not be a correct word on themselves. In such case, add them to the custom dictionary.

In case of zomer- en wintereik, I 'd prefer to add zomer- en wintereik to to the custom dictionary instead of zomer-, because the latter is not a correct word on itself (like you mention). Is it an option to implement that, or is it too complicated? (It can be useful for expressions as well, but the use is maybe too limited to do the effort?)

(Of course I don't mind adding the word manually to the dictionary file, but for now adding this is not preventing from marking zomer- as an error.)

I don't think that would work. hunspell:hunspell() does the spell checking. It considers zomer- en wintereik as three separate words.