Noisy candidate "itsumo" due to language aware conversion

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What steps will reproduce the problem?
1. Add a new word entry into dictionary as follows.
  echo -e "いつも\t1765\t1765\t10000\titsumo" >> data/dictionary_oss/dictionary09.txt
2. Rebuild Mozc and install it into desktop.
3. Type "itsumo" for "いつも"
4. Commit something, say "いつもお世話になっております"
5. Type "itsumo" for "いつも"
6. Commit something from history suggestion, say 
"いつもお世話になっております"
7. Type "itsumo" for "いつも"
8. Commit something from history suggestion, say 
"いつもお世話になっております"
9. Type "itsumo" for "いつも"

What is the expected output?
It is a bit difficult to decide what is the expected behavior in this case, but 
I don't feel comfortable when I see "→ itsumo  もしかして" at least in 
step 9.

What do you see instead?
After step 3, 5, 7, and 9, you will always see one additional candidate "→ 
itsumo  もしかして".

Please use labels and text to provide additional information.
Reproducible as of 2.16.2012.102 (r478).

Original issue reported on code.google.com by yukawa@google.com on 4 Jan 2015 at 3:43

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Original comment by yukawa@google.com on 4 Jan 2015 at 3:44

Attachments:

• actual.png

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This issue was closed by revision r479.

Original comment by yukawa@google.com on 4 Jan 2015 at 3:49

• Changed state: Fixed