Test for bug #6197.

With language Polish, "amssymb" must be loaded before "babel" to
avoid a name clash for command "\lll".

autotests/export/latex/6197-polish-amssymb.lyx

@@ -0,0 +1,111 @@
+#LyX 2.4 created this file. For more info see https://www.lyx.org/
+\lyxformat 566
+\begin_document
+\begin_header
+\save_transient_properties true
+\origin unavailable
+\textclass article
+\use_default_options true
+\maintain_unincluded_children false
+\language polish
+\language_package default
+\inputencoding auto
+\fontencoding auto
+\font_roman "lmodern" "default"
+\font_sans "default" "default"
+\font_typewriter "default" "default"
+\font_math "auto" "auto"
+\font_default_family default
+\use_non_tex_fonts false
+\font_sc false
+\font_osf false
+\font_sf_scale 100 100
+\font_tt_scale 100 100
+\use_microtype false
+\use_dash_ligatures true
+\graphics default
+\default_output_format pdf
+\output_sync 0
+\bibtex_command default
+\index_command default
+\float_placement class
+\float_alignment class
+\paperfontsize default
+\spacing single
+\use_hyperref false
+\papersize default
+\use_geometry false
+\use_package amsmath 1
+\use_package amssymb 2
+\use_package cancel 1
+\use_package esint 1
+\use_package mathdots 1
+\use_package mathtools 1
+\use_package mhchem 1
+\use_package stackrel 1
+\use_package stmaryrd 1
+\use_package undertilde 1
+\cite_engine basic
+\cite_engine_type default
+\biblio_style plain
+\use_bibtopic false
+\use_indices false
+\paperorientation portrait
+\suppress_date false
+\justification true
+\use_refstyle 1
+\use_minted 0
+\index Index
+\shortcut idx
+\color #008000
+\end_index
+\secnumdepth 3
+\tocdepth 3
+\paragraph_separation indent
+\paragraph_indentation default
+\is_math_indent 0
+\math_numbering_side default
+\quotes_style polish
+\dynamic_quotes 0
+\papercolumns 1
+\papersides 1
+\paperpagestyle default
+\tracking_changes false
+\output_changes false
+\html_math_output 0
+\html_css_as_file 0
+\html_be_strict false
+\end_header
+
+\begin_body
+
+\begin_layout Standard
+Test for bug #6197: 
+\begin_inset Quotes pld
+\end_inset
+
+amssymb
+\begin_inset Quotes prd
+\end_inset
+
+ with Polish babel.
+\end_layout
+
+\begin_layout Standard
+The mathematical symbol 0x22D8 VERY MUCH LESS-THAN must be written as 
+\backslash
+llless 
+\begin_inset Formula $\llless$
+\end_inset
+
+ because Polish babel re-defines 
+\backslash
+lll as character 0x142 LATIN SMALL LETTER L WITH STROKE: 
+\begin_inset Formula $\lll$
+\end_inset
+
+ = ł.
+\end_layout
+
+\end_body
+\end_document