fix comment in parseargs.cc

11 jobs for master in 6 minutes and 50 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
passed build #5935204

00:03:57

passed build_android #5935209

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passed build_clang_libcpp #5935205

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passed build_clazy #5935208

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passed build_mingw64_fedora #5935207

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passed build_ubuntu_16_04 #5935206

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passed clang_format #5935203

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  Document
passed cpp_docs #5935211

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passed glib_docs #5935212

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passed qt5_docs #5935210

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  Publish
passed trigger_pages #5935213

00:00:11