Move description of float window behavior to function doc section

Addresses review comments #767 (comment)

Author: rhysd

doc/LanguageClient.txt

@@ -63,13 +63,6 @@ accessed by regular quickfix/location list operations.
 To use the language server with Vim's formatting operator |gq|, set 'formatexpr': >
     set formatexpr=LanguageClient#textDocument_rangeFormatting_sync()
 <
-If you're using Neovim 0.4.0 or later, |LanguageClient#textDocument_hover()|
-opens documentation in a floating window. The window is automatically closed
-when you move the cursor. Or calling |LanguageClient#textDocument_hover()|
-again just after opening the floating window moves the cursor into the window.
-It is useful when documentation is longer and you need to scroll down or you
-want to yank some text in the documentation.
-
 ==============================================================================
 2. Configuration                                 *LanguageClientConfiguration*
 
@@ -413,6 +406,12 @@ Signature: LanguageClient#textDocument_hover(...)
 
 Show type info (and short doc) of identifier under cursor.
 
+If you're using Neovim 0.4.0 or later, this function opens documentation in a
+floating window. The window is automatically closed when you move the cursor.
+Or calling this function again just after opening the floating window moves
+the cursor into the window. It is useful when documentation is longer and you
+need to scroll down or you want to yank some text in the documentation.
+
 *LanguageClient#textDocument_definition()*
 *LanguageClient_textDocument_definition()*
 Signature: LanguageClient#textDocument_definition(...)