Add autotests for #8684

(these should currently fail)

development/autotests/bug-8684-in.txt

@@ -0,0 +1,10 @@
+Lang en_US.utf8
+TestBegin ../bug-8684.lyx > lyx-log.txt 2>&1
+KK: \Ax
+KK: command-sequence change-next; change-reject; change-next\[Return]
+TestEnd
+
+TestBegin ../bug-8684.lyx > lyx-log.txt 2>&1
+KK: \Ax
+KK: command-sequence char-forward; change-next\[Return]
+TestEnd

development/autotests/bug-8684.lyx

@@ -0,0 +1,108 @@
+#LyX 2.0 created this file. For more info see http://www.lyx.org/
+\lyxformat 413
+\begin_document
+\begin_header
+\textclass IEEEtran
+\begin_preamble
+\usepackage{algpseudocode}
+
+\algtext*{EndFor}% Remove "end while" text
+\algtext*{EndWhile}% Remove "end while" text
+\algtext*{EndIf}% Remove "end if" text
+
+\usepackage{ifsym}
+\end_preamble
+\options twoside
+\use_default_options true
+\maintain_unincluded_children false
+\language english
+\language_package default
+\inputencoding utf8
+\fontencoding global
+\font_roman default
+\font_sans default
+\font_typewriter default
+\font_default_family default
+\use_non_tex_fonts false
+\font_sc false
+\font_osf false
+\font_sf_scale 100
+\font_tt_scale 100
+
+\graphics default
+\default_output_format default
+\output_sync 0
+\output_sync_macro "\usepackage[active]{srcltx}"
+\bibtex_command default
+\index_command default
+\paperfontsize default
+\spacing single
+\use_hyperref true
+\pdf_bookmarks true
+\pdf_bookmarksnumbered true
+\pdf_bookmarksopen false
+\pdf_bookmarksopenlevel 1
+\pdf_breaklinks false
+\pdf_pdfborder true
+\pdf_colorlinks false
+\pdf_backref false
+\pdf_pdfusetitle true
+\papersize default
+\use_geometry false
+\use_amsmath 1
+\use_esint 1
+\use_mhchem 1
+\use_mathdots 1
+\cite_engine basic
+\use_bibtopic false
+\use_indices false
+\paperorientation portrait
+\suppress_date false
+\use_refstyle 1
+\index Index
+\shortcut idx
+\color #008000
+\end_index
+\secnumdepth 3
+\tocdepth 3
+\paragraph_separation indent
+\paragraph_indentation default
+\quotes_language english
+\papercolumns 1
+\papersides 2
+\paperpagestyle default
+\tracking_changes false
+\output_changes false
+\html_math_output 0
+\html_css_as_file 0
+\html_be_strict false
+\author 2022551537 "QWE" 
+\end_header
+
+\begin_body
+
+\begin_layout Standard
+i.e., 
+\change_deleted 2022551537 1368859838
+
+\begin_inset Formula $p:\mathbb{R}\rightarrow\mathbb{R}$
+\end_inset
+
+
+\change_inserted 2022551537 1368859864
+ 
+\begin_inset Formula $I\subset\mathbb{R}$
+\end_inset
+
+ and 
+\begin_inset Formula $O\subset\mathbb{R}$
+\end_inset
+
+
+\change_unchanged
+.
+ The 
+\end_layout
+
+\end_body
+\end_document