Package: diffoscope Version: 224 Severity: wishlist It would be nice if diffoscope could help highlight that text data differ only in the whitespace or if they differ in the text too.
The proposal would be that by default diffoscope would use wdiff (or similar) to compare all line based text buffers (including those converted from other formats) in order to check for whitespace-only differences. When there are non-whitespace differences then display the wdiff (or similar) output, with a comment saying these are differences in the text after ignoring whitespace. In situations where the text buffer differs only by whitespace, diffoscope would do a line diff of the text buffer itself, with a comment saying the text of the two text buffers was not different and only whitespace changes were present. Since this check probably won't be useful for all diffs of line based text buffers, probably there will need to be various heuristics for when to apply it and when not to apply it, perhaps starting with applying it to everything and then adding exceptions over time. This would be useful in some situations like when comparing old versions of a document with newer versions of a document or similar. In particular it would have been useful when preparing this mail: https://lists.debian.org/msgid-search/197a4671e7694c24424b91b4d7288867c0c85d9b.ca...@debian.org -- System Information: Debian Release: bookworm/sid APT prefers testing-debug APT policy: (900, 'testing-debug'), (900, 'testing'), (800, 'unstable-debug'), (800, 'unstable'), (790, 'buildd-unstable'), (700, 'experimental-debug'), (700, 'experimental'), (690, 'buildd-experimental') merged-usr: no Architecture: amd64 (x86_64) Kernel: Linux 6.0.0-1-amd64 (SMP w/8 CPU threads; PREEMPT) Kernel taint flags: TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE Locale: LANG=en_AU.utf8, LC_CTYPE=en_AU.utf8 (charmap=UTF-8), LANGUAGE=en_AU:en Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled Versions of packages diffoscope depends on: ii diffoscope-minimal 224 Versions of packages diffoscope recommends: ii abootimg 0.6-1+b2 ii acl 2.3.1-1 ii androguard 3.4.0~a1-5 ii apksigner 31.0.2-1 ii apktool 2.6.1+dfsg.1-2 ii binutils-multiarch 2.39-8 ii bzip2 1.0.8-5+b1 ii caca-utils 0.99.beta20-3 ii colord 1.4.6-1 ii coreboot-utils 4.15~dfsg-2 ii db-util 5.3.1+nmu1 ii default-jdk [java-sdk] 2:1.11-72 ii default-jdk-headless 2:1.11-72 pn device-tree-compiler <none> pn docx2txt <none> ii e2fsprogs 1.46.6~rc1-1+b1 ii enjarify 1:1.0.3-5 ii ffmpeg 7:5.1.2-1 ii fontforge-extras 1:20220308~dfsg-1 pn fp-utils <none> ii genisoimage 9:1.1.11-3.4 ii gettext 0.21-9 ii ghc 9.0.2-4 ii ghostscript 9.56.1~dfsg-1 ii giflib-tools 5.2.1-2.5 ii gnumeric 1.12.52-1 ii gnupg 2.2.39-1 ii gnupg-utils 2.2.39-1+b1 pn hdf5-tools <none> ii imagemagick 8:6.9.11.60+dfsg-1.3+b3 ii imagemagick-6.q16 [imagemagick] 8:6.9.11.60+dfsg-1.3+b3 ii jsbeautifier 1.14.4-1 ii libarchive-tools 3.6.0-1 pn libxmlb-dev <none> ii llvm 1:14.0-55.2+b1 ii lz4 [liblz4-tool] 1.9.4-1 pn mono-utils <none> ii ocaml-nox 4.13.1-3 pn odt2txt <none> pn oggvideotools <none> ii openjdk-11-jdk [java-sdk] 11.0.17+8-2 ii openssh-client 1:9.0p1-1+b2 ii openssl 3.0.5-4 ii pgpdump 0.34-1 ii poppler-utils 22.08.0-2.1 pn procyon-decompiler <none> ii python3-argcomplete 2.0.0-1 ii python3-binwalk 2.3.3+dfsg1-2 ii python3-debian 0.1.48 ii python3-defusedxml 0.7.1-2 ii python3-guestfs 1:1.48.4-2+b1 hi python3-jsondiff 1.1.1-4 ii python3-pdfminer 20220319+dfsg-1 ii python3-progressbar 2.5-3 ii python3-pypdf2 2.11.0-1 ii python3-pyxattr 0.7.2-2+b1 ii python3-rpm 4.17.1.1+dfsg-1 ii python3-tlsh 3.4.4+20151206-1.4+b2 pn r-base-core <none> pn radare2 <none> ii rpm2cpio 4.17.1.1+dfsg-1 ii sng 1.1.0-4 ii sqlite3 3.39.4-1 ii squashfs-tools 1:4.5.1-1 ii tcpdump 4.99.1-4+b1 ii u-boot-tools 2022.10+dfsg-1 ii unzip 6.0-27 pn wabt <none> pn xmlbeans <none> ii xxd 2:9.0.0626-1 ii xz-utils 5.2.5-2.1 ii zip 3.0-12 ii zstd 1.5.2+dfsg-1 Versions of packages diffoscope suggests: ii libjs-jquery 3.6.1+dfsg+~3.5.14-1 -- no debconf information -- bye, pabs https://wiki.debian.org/PaulWise
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