# Lines starting with # are ignored.
# Lines can be continued on the next line using trailing backslash.
#
# Format:
# %summary:: summary format
# section:: element1[,element2]...
# The literal text line to be added to Bugzilla comment. Can be empty.
# (IOW: empty lines are NOT ignored!)
#
# Summary format is a line of text, where %element% is replaced by
# text element's content, and [[...%element%...]] block is used only if
# %element% exists. [[...]] blocks can nest.
#
# Sections can be:
# - %summary: bug summary format string.
# - %attach: a list of elements to attach.
# - text, double colon (::) and the list of comma-separated elements.
#   Text can be empty (":: elem1, elem2, elem3" works),
#   in this case "Text:" header line will be omitted.
#
# Elements can be:
# - problem directory element names, which get formatted as
#   <element_name>: <contents>
#   or
#   <element_name>:
#   :<contents>
#   :<contents>
#   :<contents>
# - problem directory element names prefixed by "%bare_",
#   which is formatted as-is, without "<element_name>:" and colons
# - %oneline, %multiline, %text wildcards, which select all corresponding
#   elements for output or attachment
# - %binary wildcard, valid only for %attach section, instructs to attach
#   binary elements
# - problem directory element names prefixed by "-",
#   which excludes given element from all wildcards
#
#   Nonexistent elements are silently ignored.
#   If none of elements exists, the section will not be created.

Another user experienced a similar problem:

# If user filled out comment field, show it:
:: %bare_comment

# var_log_messages has too much variance (time/date),
# we exclude it from message so that dup message elimination has more chances to work
:: \
    -pkg_arch,-pkg_epoch,-pkg_name,-pkg_release,-pkg_version,\
        -component,-architecture,\
    -analyzer,-count,-duphash,-uuid,-abrt_version,\
    -username,-hostname,-os_release,-os_info,\
    -time,-pid,-pwd,-last_occurrence,-ureports_counter,\
    -var_log_messages,\
    %reporter,\
    %oneline