About the construction of lines in the MS

[Jorge_Stolfi]

The internal split points marked with <-> do show part of the same effect seen at true line endings, but more weakly. ...That is exactly what happens on the left side of the split. The right side of the split shows a weaker version of the same pattern.

In retrospect, that makes sense.   At the right rail, the Scribe must have tried harder to avoid a large gap, and also about creating a "widow" -- a parag tail line with only one or two words.  At a figure intrusion, those defects would have been less objectionable.  Thus, instead of abbreviating aiin as am before an intrusion, he might just leave a blank gap and write the aiin after the intrusion.  And he would not care if the line ended with a single word after the intrusion.

By the way, this is a quick statistic that I computed on the Starred Parags section.  I looked at the word frequencies of the fourth token from the end of each line (second column) and on the last token of each line (third column).  The last signed number is the log of the ratio between the two frequencies, slightly cooked to avoid infinities.  Thus a positive value means a word that occurs more often in the -4 position, and a negative value is the reverse.  This clip is the 19 words with most extreme difference in each direction. 

Code:

am          |  .    | 0.0375 | +12.835 otam        |  .    | 0.0100 | +11.513 ary          |  .    | 0.0088 | +11.379 dal          |  .    | 0.0088 | +11.379 dam          |  .    | 0.0088 | +11.379 ram          |  .    | 0.0088 | +11.379 okam        |  .    | 0.0063 | +11.043 qotam        |  .    | 0.0063 | +11.043 aral        |  .    | 0.0050 | +10.820 chedam      |  .    | 0.0050 | +10.820 kam          |  .    | 0.0050 | +10.820 ldy          |  .    | 0.0050 | +10.820 oly          |  .    | 0.0050 | +10.820 om          |  .    | 0.0050 | +10.820 aiinal      |  .    | 0.0037 | +10.532 lkam        |  .    | 0.0037 | +10.532 olam        |  .    | 0.0037 | +10.532 opam        |  .    | 0.0037 | +10.532 raram        |  .    | 0.0037 | +10.532 ... skaiin      | 0.0026 |  .    | -10.166 tchey        | 0.0026 |  .    | -10.166 aiiin        | 0.0039 |  .    | -10.574 aiir        | 0.0039 |  .    | -10.574 char        | 0.0039 |  .    | -10.574 chody        | 0.0039 |  .    | -10.574 kaiin        | 0.0039 |  .    | -10.574 keey        | 0.0039 |  .    | -10.574 pchedy      | 0.0039 |  .    | -10.574 qokchedy    | 0.0039 |  .    | -10.574 taiin        | 0.0039 |  .    | -10.574 kchedy      | 0.0052 |  .    | -10.861 l            | 0.0052 |  .    | -10.861 otar        | 0.0052 |  .    | -10.861 chedar      | 0.0065 |  .    | -11.084 cheedy      | 0.0065 |  .    | -11.084 chor        | 0.0065 |  .    | -11.084 cheo        | 0.0091 |  .    | -11.420 otedy        | 0.0117 |  .    | -11.672

I think that these numbers show clearly that the ending -iin often gets abbreviated to -m, in all sorts of words.  The full table shows other  abbreviation/splitting/joining anomalies 

(Did I complain already about this wonderful forum software, that cannot handle spaces correctly, not even n code inserts?)