Fix for unnecessary escaped $

docs/add_language.md

@@ -157,7 +157,7 @@ and what needs to be improved.
 
 * Make the spelling-to-phoneme translation rules more accurate, including the position of stressed syllables within words. Some languages are easier than others. I expect most are easier than English.
 * Improve the sounds of the phonemes. It may be that a phoneme should sound different depending on adjacent sounds, or whether it's at the start or the end of a word, between vowels, in a stressed or unstressed syllable, etc. This may consist of making small adjustments to vowel and diphthong quality or length, or adjusting the strength of consonants. Phoneme definitions can include conditional statements which can be used to change the sound of a phoneme depending on its environment. Bigger changes may be recording new or replacement consonant sounds, or may even need program code to implement new types of sounds.
-* Some common words should be added to the dictionary (the fr_list file for the language) with an "unstressed" attribute **\$u** or **\$u+** (eg. in English, words such as "the", "is", "had", "my", "she", "of", "in", "some"), or should be preceded by a short pause (such as "and", "but", "which"), or have other attributes, in order to make the speech flow better.
+* Some common words should be added to the dictionary (the fr_list file for the language) with an "unstressed" attribute **$u** or **$u+** (eg. in English, words such as "the", "is", "had", "my", "she", "of", "in", "some"), or should be preceded by a short pause (such as "and", "but", "which"), or have other attributes, in order to make the speech flow better.
 * Improve the rhythm of the speech by adjusting the relative lengths of vowels in different contexts, eg. stressed/unstressed syllable, or depending on the following phonemes. This is important for making the speech sound good for the language.
 * Make new intonation "tunes" for statements or questions (see [Intonation](intonation.md)).