M+ fonts are generated from the M+ outline fonts TESTFLIGHT 63a retrieved from mplus-fonts.osdn.jp/mplus-outline-fonts/download/index-en.html.
The following changes were made using fontforge to produce mplus1mn-*-ascii.ttf fonts:
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Subsetted to include (ascii variant):
** Non-visible Characters (U+00a0) ** Basic Latin (U+0020–U+007e) ** Enclosed Numbers (U+2460–U+2473, U+2776–U+277f, U+24eb–U+24f4) (M+ 1mn Regular only) ** Box Drawing Symbols (U+2500–U+257f) ** .notdef glyph
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Subsetted to include (subset variant):
** Non-visible Characters (U+00a0) ** Basic Latin (U+0020–U+007e) ** Latin-1 Supplement (U+00a0–U+00fd) ** Latin Extended-A (U+0100–U+017f) ** Greek Alphabet (U+0391–U+03c9) ** Cyrillic (U+0400–U+04ff) ** Assorted Symbols (U+20ac, U+2713–U+2714) ** Enclosed Numbers (U+2460–U+2473, U+2776–U+277f, U+24eb–U+24f4) (mplus1mn-regular only) ** Box Drawing Symbols (U+2500–U+257f) ** .notdef glyph
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Added BOM (U+feff) and line feed (U+000a) characters (from blank)
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Generated old-style kern table (neither Apple or OpenType) (required to make kerning work in Prawn) (flags: 0x90)
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Removed Truetype instructions (information not used by Prawn) (flags: 0x08)
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Generated with PS Glyph Names option enabled (didn't use 0x04 flag)
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Generate flags used, in total: 0x90 + 0x08